TWI834529B - Illuminated keyboard and backlight module thereof - Google Patents

Abstract

An illuminated keyboard includes a backlight module, which includes a light guide plate, a plurality of first light emitting modules and a plurality of second light emitting modules. The light guide plate includes a first side and a second side opposite to each other, a plurality of first accommodating portions, and a plurality of second accommodating portions. Each of the first accommodating portions has a first incident surface facing the first side. The second accommodating portions are arranged alternately with the first accommodating portions. Each of the second accommodating portions has a second incident surface facing the second side. The first light emitting modules are disposed in the first accommodating portions respectively. The wavelengths of the light emitted by the first light emitting modules are different at an initial time, and the wavelength of the light is changed at intervals of a predetermined time. The second light emitting modules are disposed in the second accommodating portions respectively. The wavelengths of the light emitted by the second light emitting modules are different at the initial time, and the wavelength of the light is changed at intervals of the predetermined time.

Description

Luminous keyboard and its backlight module

The present invention relates to a luminous keyboard, and in particular to a backlight module of the luminous keyboard.

Today's rapid development of electronic technology and information industry has made computers, laptops, tablets, smart phones, etc., become indispensable electronic devices for modern people in their daily life or work. In terms of current computer usage habits, the keyboard is one of the indispensable input devices. Portable electronic devices such as laptops, tablets, and smartphones are often used with keyboards.

For reasons such as convenience of keyboard use or aesthetics, luminous keyboards have been launched on the market. Among them, e-sports keyboards designed specifically for e-sports games are more common with light sources that display a variety of different color changes. Generally speaking, in order to make a light-emitting keyboard present various color changes, a light source is provided corresponding to each key structure, such as a light-emitting diode (Light-emitting diode, LED for short) module. That is to say, each light-emitting diode module corresponds to one of the button structures to achieve a variety of color changes. However, this arrangement of each key structure corresponding to a light-emitting diode module will significantly increase the manufacturing cost of the light-emitting keyboard, and there is still room for improvement.

In view of the above problems, the main purpose of the present invention is to provide a luminous keyboard and its backlight module, by arranging a plurality of (first, second) luminous modules on a light guide plate, and (first, second) ) The novel design of the light-emitting module emitting light of different wavelengths at different points in time solves the problem of significantly increasing the manufacturing cost of conventional light-emitting keyboards and their backlight modules to achieve changes in light-emitting color.

In order to achieve the above object, the present invention provides a luminous keyboard, which includes a base plate, a plurality of key structures and a backlight module. The key structures are connected to the base plate. The backlight module is arranged on the bottom panel and located below the button structures. The backlight module includes a light guide plate, a plurality of first light-emitting modules and a plurality of second light-emitting modules. The light guide plate includes an opposite first side and a second side, a plurality of first accommodating parts, and a plurality of second accommodating parts. The first receiving portions are disposed between the first side and the second side. Each of the first receiving parts has a first incident surface, and the first incident surface faces the first side. The second accommodating parts are alternately arranged with the first accommodating parts. Each of the second receiving parts has a second incident surface, and the second incident surface faces the second side. The first light-emitting modules are respectively arranged in the first accommodating parts. The wavelengths of the light emitted by the first light-emitting modules are different at a starting time, and the wavelength of the light is changed every predetermined time interval. The light emitted by the first light-emitting modules respectively enters the light guide plate from the first incident surface, and forms a plurality of first light mixing areas between the first accommodation parts and the first side. The second light-emitting modules are respectively arranged in the second accommodating parts. The wavelengths of the light emitted by the second light-emitting modules at the starting time are different, and the wavelength of the light is changed every predetermined time interval. wavelength. The light emitted by the second light-emitting modules respectively enters the light guide plate from the second incident surface, and forms a plurality of second light mixing areas between the second accommodation portions and the second side.

In order to achieve the above object, the present invention further provides a backlight module, which includes a light guide plate, a plurality of first light-emitting modules and a plurality of second light-emitting modules. The light guide plate includes an opposite first side and a second side, a plurality of first accommodating parts, and a plurality of second accommodating parts. The first receiving portions are disposed between the first side and the second side. Each of the first receiving parts has a first incident surface, and the first incident surface faces the first side. The second accommodating parts are alternately arranged with the first accommodating parts. Each of the second receiving parts has a second incident surface, and the second incident surface faces the second side. The first light-emitting modules are respectively arranged in the first accommodating parts. The wavelengths of the light emitted by the first light-emitting modules are different at a starting time, and the wavelength of the light is changed every predetermined time interval. The light emitted by the first light-emitting modules respectively enters the light guide plate from the first incident surface, and forms a plurality of first light mixing areas between the first accommodation parts and the first side. The second light-emitting modules are respectively arranged in the second accommodating parts. The wavelengths of the light emitted by the second light-emitting modules at the starting time are different, and the wavelengths of the light are changed every predetermined time interval. The light emitted by the second light-emitting modules respectively enters the light guide plate from the second incident surface, and forms a plurality of second light mixing areas between the second accommodation portions and the second side.

According to an embodiment of the present invention, the light guide plate further includes an opposite third side and a fourth side. The first light-emitting modules and the second light-emitting modules are arranged from the third side to the fourth side, and are parallel to the first side and the second side.

According to an embodiment of the present invention, the wavelength of the light emitted by the first light-emitting modules at the starting time gradually decreases from the third side to the fourth side.

According to an embodiment of the present invention, the wavelength of the light emitted by the second light-emitting modules at the starting time gradually decreases from the fourth side to the third side.

According to an embodiment of the present invention, the wavelengths of the light emitted by the adjacent first light-emitting modules and the adjacent second light-emitting modules at the same time are different.

According to an embodiment of the present invention, the wavelength difference of the light emitted by two adjacent first light-emitting modules is within a predetermined wavelength range, and the wavelength difference of the light emitted by two adjacent second light-emitting modules is within within a predetermined wavelength range. The predetermined wavelength range is between 5nm and 35nm.

According to an embodiment of the present invention, the light guide plate has a central area, and the first accommodating parts and the second accommodating parts are disposed in the central area.

According to an embodiment of the present invention, the number of the first light-emitting modules is greater than or equal to 12, and the number of the second light-emitting modules is greater than or equal to 12.

According to an embodiment of the present invention, the number of the first light mixing areas is greater than or equal to 3, and the number of the second light mixing areas is greater than or equal to 3.

According to an embodiment of the present invention, the first incident surface has a first length from the first side. The light emitted by each first light-emitting module forms a first light radiation area between the first accommodation part and the first side. The first light radiation area forms a first irradiation width on the first side, and the ratio of the first irradiation width to the first length is greater than 2.

According to an embodiment of the present invention, the ratio of the first irradiation width to the first length is between 2 and 5.

According to an embodiment of the present invention, the first light mixing area is an area where at least two first light radiation areas formed by the first light emitting modules overlap with each other.

According to an embodiment of the present invention, the area where the four first light radiation areas overlap each other is a fourth-order first light mixing area. The first light mixing zone includes a plurality of fourth-order first light mixing zones.

According to an embodiment of the present invention, the second incident surface has a second length from the second side. The light emitted by each second light-emitting module forms a second light radiation area between the second accommodation part and the second side. The second light radiation area forms a second irradiation width on the second side. The ratio of the second irradiation width to the second length is greater than 2.

According to an embodiment of the present invention, the ratio of the second irradiation width to the second length is between 2 and 5.

According to an embodiment of the present invention, the second light mixing area is an area where at least two second light radiation areas formed by the second light emitting modules overlap with each other.

According to an embodiment of the present invention, the area where the four second light radiation areas overlap each other is a fourth-order second light mixing area. The second light mixing zone includes a complex fourth-order second light mixing zone.

As mentioned above, according to the luminous keyboard and its backlight module of the present invention, the backlight module includes a light guide plate, a plurality of first luminous modules and a plurality of second luminous modules. The light guide plate includes an opposite first side and a second side, a plurality of first accommodating parts, and a plurality of second accommodating parts. The first light-emitting modules are respectively arranged in the first accommodating portion of the light guide plate, and the first incident surface faces the first side. The second light-emitting modules are respectively arranged in the second accommodating parts, and the second incident surface faces the second side. In addition, the first light-emitting modules at a starting time The wavelengths of the light emitted are different, and each first light-emitting module changes the wavelength of the light at a predetermined time interval, so that a flickering effect similar to a marquee can be produced between the first accommodating portion and the first side of the light guide plate. . Similarly, the wavelengths of the light emitted by the second light-emitting modules at the starting time are different, and each second light-emitting module changes the wavelength of the light at intervals of the predetermined time, so that the second accommodating portion of the light guide plate and A flickering effect similar to a marquee can also be produced between the two sides. In addition, the entire light guide plate can also produce a circular cyclic color change effect. With the foregoing structure, even if the number of the first light-emitting module and the second light-emitting module is much smaller than the number of key structures, the light-emitting keyboard and its backlight module can produce various color changes. Compared with the conventional luminous keyboard and backlight module, the number of (first and second) luminous modules can be greatly reduced, thereby reducing manufacturing costs.

1: Illuminated keyboard

10:Backlight module

11:Light guide plate

111: First side

112:Second side

113:Third side

114:Fourth side

115:First Accommodation Department

1151: First incident surface

116:Second Accommodation Department

1161:Second incident surface

117:Central area

118: Reflective structure

12:The first light-emitting module

13:Second light emitting module

20: Bottom plate

30:Button structure

31:Keycap

F1, F11, F12, F13: first light radiation area

F2, F21, F22, F23: second light radiation area

L1: first length

L2: second length

M1: The first mixed light zone

M11: Second-order first mixed light zone

M12: The third-order first mixed light zone

M13: The fourth-order first mixed light zone

M2: The second mixed light zone

M21: Second-order second mixed light zone

M22: Third-order second mixed light zone

M23: Fourth-order second mixed light zone

W1: first irradiation width

W2: Second irradiation width

FIG. 1 is a schematic diagram of a light-emitting keyboard according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the backlight module shown in FIG. 1 .

FIG. 3 is a partially enlarged schematic diagram of the light guide plate shown in FIG. 2 .

FIG. 4 is a schematic diagram of light transmission from the first light-emitting module and the second light-emitting module shown in FIG. 2 to the light guide plate.

FIG. 5 is a partially enlarged schematic diagram of the backlight module shown in FIG. 4 .

FIG. 6 is a schematic diagram of the light guide plate, the first light-emitting module and the second light-emitting module shown in FIG. 4 .

In order to better understand the technical content of the present invention, preferred specific embodiments are described below.

Figure 1 is a schematic diagram of a light-emitting keyboard according to an embodiment of the present invention. Figure 2 is a schematic diagram of the backlight module shown in Figure 1. Figure 3 is a partially enlarged schematic diagram of the light guide plate shown in Figure 2. Please refer to Figure 1 and As shown in Figure 2 and Figure 3. In this embodiment, the luminous keyboard 1 includes a backlight module 10 , a base plate 20 and a plurality of key structures 30 . The key structure 30 is connected to the base plate 20 . The key structure 30 has a key cap 31 and a connecting piece (not shown). The base plate 20 and the keycap 31 are connected through a connecting member, so that the keycap 31 can move up and down relative to the base plate 20. The connecting component can be a scissor-type link component, but the disclosure is not limited thereto. In practical applications, the connecting component can also be replaced with other structures with similar functions, such as V-shaped, A-shaped or two parallel link structures. The backlight module 10 is disposed on the base plate 20 and located below the key structure 30 . In other words, the backlight module 10 is disposed on the side of the base plate 20 opposite to the key structure 30 .

The backlight module 10 of this embodiment includes a light guide plate 11, a plurality of first light-emitting modules 12 and a plurality of second light-emitting modules 13. The light guide plate 11 includes an opposite first side 111 and a second side 112, and an opposite third side 113 and a fourth side 114. Specifically, the light guide plate 11 is, for example, a rectangular plate. In this embodiment, the two opposite long sides of the light guide plate 11 are called the first side 111 and the second side 112 respectively, and the two opposite short sides of the light guide plate 11 are called the third side 113 and the fourth side 114 respectively. . In other embodiments, the first side 111 and the second side 112 may also be portions of the light guide plate 11 The third side 113 and the fourth side 114 are opposite short sides, and are not limited by the present invention.

The light guide plate 11 also includes a plurality of first accommodating portions 115 and a plurality of second accommodating portions 116 . The first accommodating part 115 and the second accommodating part 116 are provided between the first side 111 and the second side 112, and are arranged parallel to the first side 111 (or the second side 112). Preferably, the light guide plate 11 has a central area 117 . The central area 117 is parallel to the first side 111 and the second side 112 . That is to say, in this embodiment, the middle area between the first side 111 and the second side 112 is called the central area 117 . The first accommodating part 115 and the second accommodating part 116 are provided in the central area 117 .

In addition, the second accommodating parts 116 and the first accommodating parts 115 are provided alternately. That is to say, the first accommodating parts 115 and the second accommodating parts 116 are arranged in a staggered manner. As shown in FIG. 3 , the first accommodating part 115 and the second accommodating part 116 are arranged repeatedly in sequence from the third side 113 . In addition, the first accommodating part 115 and the second accommodating part 116 may be, for example, through holes or grooves, respectively accommodating the first light-emitting module 12 and the second light-emitting module 13 . Specifically, the first light-emitting modules 12 are respectively arranged in the first accommodating parts 115, and the second light-emitting modules 13 are respectively arranged in the second accommodating parts 116. Since the second accommodating parts 116 and the first accommodating parts 115 are arranged alternately, the first light-emitting modules 12 and the second light-emitting modules 13 are arranged alternately in the central region 117 . In this embodiment, the first light-emitting module 12 and the second light-emitting module 13 are repeatedly and sequentially arranged from the third side 113 to the fourth side 114 and are parallel to the first side 111 and the second side 112 .

As shown in FIG. 3 , each first receiving portion 115 has a first incident surface 1151 , and the first incident surface 1151 faces the first side 111 . Each second receiving portion 116 It has a second incident surface 1161 , and the second incident surface 1161 faces the second side 112 . The first incident surface 1151 and the second incident surface 1161 are surfaces through which light enters the light guide plate 11 . FIG. 4 is a schematic diagram of light from the first light-emitting module and the second light-emitting module shown in FIG. 2 being transmitted to the light guide plate. FIG. 5 is a partially enlarged schematic diagram of the backlight module shown in FIG. 4 . Please refer to FIG. 3 , FIG. 4 and FIG. 5 . When the first light-emitting module 12 is installed in the first receiving part 115 , the light emitting direction of the first light-emitting module 12 can be directed toward the first incident surface 1151 (as shown in FIG. 5 shown). The light emitted by the first light-emitting module 12 can enter the light guide plate 11 from the first incident surface 1151 and pass toward the first side 111 , and form a first light radiation area between the first accommodating portion 115 and the first side 111 F1, as shown by the dotted lines in Figures 4 and 5. Taking the first light-emitting module 12 closest to the third side 113 as an example, the light emitted by it can form a first light radiation area F11 between the first accommodating part 115 and the first side 111, as shown in Figure 5 Shown by dashed line. In the same way, the light emitted by the second and third first light-emitting modules 12 from the third side 113 form first light radiation areas F12 and F13 respectively between the first accommodating part 115 and the first side 111 , as shown in Figure 5.

Correspondingly, when the second light-emitting module 13 is installed in the second accommodating portion 116, the light emitting direction of the second light-emitting module 13 can be directed toward the second incident surface 1161 (as shown in FIG. 5). The light emitted by the second light-emitting module 13 can enter the light guide plate 11 from the second incident surface 1161 and pass toward the second side 112, and form a second light radiation area between the second accommodating portion 116 and the second side 112. F21, as shown by the dotted lines in Figures 4 and 5. Taking the first, second and third second light-emitting modules 13 closest to the third side 113 as an example, the light emitted by them can be between the second accommodating part 116 and the second side 112 respectively. Second light radiation areas F21, F22, and F23 are formed therebetween, as shown in Figure 5. The symbol of the second light radiation area F21 is marked in Figure 5.

Preferably, the light guide plate 11 also includes a plurality of reflective structures 118, which respectively correspond to one keycap 31. Alternatively, multiple reflective structures 118 correspond to one key structure 30 . After the light emitted by the first light-emitting module 12 and the second light-emitting module 13 enters the light guide plate 11 and is transmitted to the reflective structure 118, part of the light can be emitted in the direction of the keycap 31, thereby making the light-transmitting part of the keycap 31 Or the surrounding of the key structure 30 emits light to achieve the luminous effect of the luminous keyboard 1. The reflective structure 118 can be formed by printing ink, or can be a micro-reflective structure (micro lens) produced by laminating the light guide plate 11. However, the present invention does not This is the limit.

In addition, the first light-emitting module 12 and the second light-emitting module 13 of this embodiment are light sources that can change the light-emitting color. Specifically, the first light-emitting module 12 and the second light-emitting module 13 can respectively include a plurality of light-emitting units of different colors, such as light-emitting diodes that can emit red light, green light, and blue light, and cooperate with circuits and chip programs. Control allows the first light-emitting module 12 and the second light-emitting module 13 to emit light of different colors at different time points. That is to say, each first light-emitting module 12 and each second light-emitting module 13 can emit light of different wavelengths at different time points, and the predetermined wavelength range is between 380nm and 750nm (i.e., the predetermined wavelength range of visible light) , to produce different colors of light.

Similarly, with the control of the circuit and chip program, the wavelengths of the light emitted by the first light-emitting modules 12 at a starting time are different. That is to say, the light colors of the first light-emitting modules 12 are different when the backlight module 10 turns on the light source. Preferably, the wavelength of the light emitted by the first light-emitting modules 12 at the starting time gradually decreases from the third side 113 to the fourth side 114 . That is to say, at the starting time, the emission wavelength of the first light-emitting module 12 closer to the third side 113 is longer, and the emission wavelength of the first light-emitting module 12 closer to the fourth side 114 is shorter. For example, at the starting time, the luminous wavelength of the first light-emitting module 12 closest to the third side 113 is 700 nm (showing red), and the luminous wavelength of the first light-emitting module 12 closest to the fourth side 114 is 400 nm (showing red). Purple). The first light radiation area F1 between the central area 117 and the first side 111 of the light guide plate 11 shows a gradient color change from red light to purple light from the third side 113 to the fourth side 114 at the starting time, as shown in Figure 4 The direction of the arrow is shown.

As mentioned above, the first light-emitting module 12 is a light source that can change the luminous color. Therefore, it can cooperate with the control of the circuit and chip program to make the first light-emitting module 12 change the wavelength of the light at a predetermined interval (for example, 1 second), and then Change the light color. Preferably, the first light-emitting module 12 can cyclically change the luminous wavelength according to a specific color, so that the first light-emitting module 12 can cyclically emit light of different colors. For example, the predetermined color cycle may be red light, orange light, yellow light, green light, blue light, or purple light. Therefore, the first light-emitting module 12 closest to the third side 113 emits red light at the starting time, and sequentially switches to emit orange light, yellow light, green light, blue light, and purple light every 1 second to complete a color cycle. . The first light-emitting module 12 closest to the fourth side 114 emits purple light at the starting time, and sequentially switches to emit red light, orange light, yellow light, green light, and blue light every 1 second to complete a color cycle.

Since the first light-emitting module 12 changes the wavelength of the light every predetermined time interval, the light emitted by the adjacent first light-emitting module 12 at the same time has a different wavelength. The wavelengths are also different. It can be seen from the above description that the wavelength of the light emitted by the first light-emitting module 12 at the starting time is different, and the wavelength of the light is changed every predetermined time interval. 111 produces a flickering effect similar to a marquee.

Similarly, with the control of the circuit and chip program, the wavelengths of the light emitted by the second light-emitting module 13 at the starting time are different. Preferably, the wavelength of the light emitted by the second light-emitting modules 13 at the starting time gradually decreases from the fourth side 114 to the third side 113 . That is to say, at the starting time, the emission wavelength of the second light-emitting module 13 closer to the third side 113 is shorter, and the emission wavelength of the second light-emitting module 13 closer to the fourth side 114 is longer. This configuration is opposite to the first light emitting module 12 . For example, at the starting time, the luminous wavelength of the second light-emitting module 13 closest to the third side 113 is 400 nm (appearing purple), and the luminous wavelength of the second light-emitting module 13 closest to the fourth side 114 is 700 nm (appearing purple). red). The second light radiation area F2 between the central area 117 and the second side 112 of the light guide plate 11 shows a gradient color change from red light to purple light from the fourth side 114 to the third side 113 at the starting time, as shown in Figure 4 The direction of the arrow is shown.

In addition, the second light-emitting module 13 also changes the wavelength of the light every predetermined time interval (for example, 1 second). Therefore, the wavelengths of light emitted by adjacent second light-emitting modules 13 at the same time are also different. Preferably, the second light-emitting module 13 can also cyclically change the light-emitting wavelength according to the aforementioned specific color, so that the second light-emitting module 13 can cyclically emit light of different colors. Continuing the above example, in this embodiment, the second light-emitting module 13 closest to the third side 113 emits purple light at the starting time, and every interval 1 Seconds are sequentially converted to emit red light, orange light, yellow light, green light, and blue light to complete a color cycle; and the second light-emitting module 13 closest to the fourth side 114 emits red light at the starting time, and every interval It sequentially converts into emitting orange light, yellow light, green light, blue light, and purple light in 1 second to complete a color cycle.

Therefore, the second light-emitting module 13 can also produce a flickering effect similar to a marquee between the second accommodating portion 116 and the second side 112 of the light guide plate 11 . In addition, since the arrangement of the second light-emitting module 13 is opposite to that of the first light-emitting module 12, for example, facing the first side 111 and the second side 112 respectively, and the arrangement of the colors is opposite, the overall light guide plate 11 can be Produce a cyclic color change effect. Preferably, according to the size of the light-emitting keyboard 1 currently on the market, the number of the first light-emitting modules 12 can be greater than or equal to 12, and the number of the second light-emitting modules 13 can also be greater than or equal to 12. Preferably, the number of the first light-emitting module 12 and the second light-emitting module 13 can also be less than 50 respectively. In this embodiment, the numbers of the first light-emitting modules 12 and the second light-emitting modules 13 are 24 respectively.

In other embodiments, the wavelength of the light emitted by the first light-emitting module 12 at the starting time may gradually increase from the third side 113 to the fourth side 114, and the wavelength of the light emitted by the second light-emitting module 13 at the starting time may gradually increase from the third side 113 to the fourth side 114. The wavelength of the light can gradually decrease from the fourth side 114 to the third side 113 , which can also achieve a circular circulation color change effect on the entire light guide plate 11 .

FIG. 6 is a schematic diagram of the light guide plate, the first light-emitting module and the second light-emitting module shown in FIG. 4 . That is to say, for clarity of the drawing, the reflective structure 118 and perforations in FIG. 4 are removed. Please refer to Figure 4, Figure 5 and Figure 6. Also, the first glow The light emitted by the module 12 enters the light guide plate 11 from the first incident surface 1151, and forms a plurality of first light mixing areas M1 between the first receiving portion 115 and the first side. The first light mixing area M1 is an area where at least two first light radiation areas F1 formed by the first light emitting module 12 overlap with each other. For example, the area where the two first light-emitting modules 12 closest to the third side 113 overlap each other in the two first light radiation areas F1 (ie, F11 and F12) formed by the light guide plate 11 is referred to here as the second-order first Mixed light area M11. The area where the three first light-emitting modules 12 closest to the third side 113 overlap with each other in the three first light radiation areas F1 (ie, F11, F12 and F13) formed by the light guide plate 11 is called the third level here. The first light mixing zone M12. The area where the four first light-emitting modules 12 closest to the third side 113 overlap each other in the four first light radiation areas F1 formed by the light guide plate 11 is called the fourth-order first light mixing area M13 here.

Similarly, the light emitted by the second light-emitting module 13 enters the light guide plate 11 from the second incident surface 1161, and forms a plurality of second light mixing areas M2 between the second accommodating portion 116 and the second side 112. Specifically, the second light mixing area M2 is an area where at least two second light radiation areas F2 formed by the second light emitting module 13 overlap with each other. In this embodiment, the area where the two second light-emitting modules 13 closest to the third side 113 overlap each other in the two second light radiation areas F2 (ie, F21 and F22) formed by the light guide plate 11 is called here. It is the second-order second mixed light area M21. The area where the three second light-emitting modules 13 closest to the third side 113 overlap with each other in the three second light radiation areas F2 (i.e., F21, F22 and F23) formed by the light guide plate 11 is called the third level here. The second light mixing area M22. The four second light-emitting modules 13 closest to the third side 113 are located on the light guide plate 11 The formed area where the four second light radiation areas overlap with each other is called a fourth-order second light mixing area M23 here.

In this embodiment, the first light-emitting module 12 forms at least two, three and four overlapping areas of the first light radiation areas F1 in the light guide plate 11 , that is, the second-order first light mixing areas M11 and M11 . A first-level light mixing zone M12 and a fourth-level first light mixing zone M13 are provided to achieve a richer color distribution. The area adjacent to the first side 111 further includes a plurality of fourth-level first light mixing zones M13 to ensure that the The first side 111 that is far away from the first light-emitting module 12 can have continuous and rich color scale changes. The second light-emitting module 13 also has the same configuration as the first light-emitting module 12, which will not be described again here.

Preferably, the wavelength difference of the light emitted by two adjacent first light-emitting modules 12 at the same time is within a predetermined wavelength range. The predetermined wavelength range is between 5nm and 35nm, which is the wavelength range in which two different colors of light can mix with each other. Generally speaking, the spectrum of visible light can be divided into two ranges. One is the first range from the start of purple light (380nm) to the end of green light (565nm), which is 185nm, and the other is the second range, which is 175nm, from the start of yellow light (565nm) to the end of red light (740nm). Preferably, this embodiment has 24 first light-emitting modules 12, so the two ranges can be divided into 12 levels on average. The difference in each step in the first range (185nm) is about 15nm. (175nm) The average difference at each step is about 14nm, all within the predetermined wavelength range. Through the above design, the first light-emitting module 12 and the second light-emitting module 13 can form the first light mixing area M1 and the second light mixing area M2 on the light guide plate 11 .

Preferably, the number of the first light mixing areas M1 is greater than or equal to 3, and the number of the second light mixing areas M2 is greater than or equal to 3. By forming the first light mixing area M1 and the second light mixing area M2 with the light guide plate 11 , the luminous keyboard 1 and the backlight module 10 can exhibit more diverse color changes, and realize a full-color luminous keyboard 1 .

In addition, the amplitude of the first light radiation area F1 formed by the first light emitting module 12 can be used so that the first light mixing area M1 can include a plurality of fourth-order first light mixing areas M13. Among them, FIG. 4 and FIG. 6 indicate three fourth-order first light mixing areas M13 as examples. Specifically, the first incident surface 1151 to the first side 111 of this embodiment has a first length L1, as shown in FIG. 6 . In addition, when the light emitted by the first light-emitting module 12 is transmitted to the first side 111 in the light guide plate 11, a first illumination width W1 can be formed on the first side 111. That is to say, the first light radiation area F1 can form the first irradiation width W1 on the first side 111 . In this embodiment, the ratio of the first irradiation width W1 to the first length L1 is greater than 2. In other words, the first irradiation width W1 is greater than 2 times the first length L1. Preferably, the ratio of the first irradiation width W1 to the first length L1 is between 2 and 5, more preferably between 2.8 and 4.3. For example, the light emitting angle of the first light emitting module 12 may be between 110 degrees and 130 degrees. When the light emitting angle is 110 degrees, the first illumination width W1 is approximately 2.86 times the first length L1. When the lighting angle is 130 degrees, the first irradiation width W1 is approximately 4.29 times the first length L1. Through the aforementioned restrictions, the four first light radiation areas F1 can overlap with each other to form a fourth-order first mixed light area M13, and there can be a plurality of fourth-order first light mixed areas M13 to present more levels of color stacking. and changes.

Similarly, the second incident surface 1161 to the second side 112 of this embodiment has a second length L2, as shown in FIG. 6 . In addition, the second light radiation area F2 may form a second irradiation width W2 on the second side 112 . In this embodiment, the ratio of the second irradiation width W2 to the second length L2 is greater than 2, preferably between 2 and 5, and more preferably between 2.8 and 4.3. Similarly, the light emitting angle of the second light emitting module 13 may be between 110 degrees and 130 degrees. When the light emission angle is 110 degrees, the second illumination width W2 is approximately 2.86 times the second length L2. When the light emission angle is 130 degrees, the second illumination width W2 is approximately 4.29 times the second length L2. Through the aforementioned restrictions, the four second light radiation areas F2 can overlap each other to form a fourth-order second light mixing area M23, and there can be a plurality of fourth-order second light mixing areas M23 to present more levels of color stacking. and changes.

To sum up, according to the luminous keyboard and its backlight module of the present invention, the backlight module includes a light guide plate, a plurality of first luminous modules and a plurality of second luminous modules. The light guide plate includes an opposite first side and a second side, a plurality of first accommodating parts, and a plurality of second accommodating parts. The first light-emitting modules are respectively arranged in the first accommodating portion of the light guide plate, and the first incident surface faces the first side. The second light-emitting modules are respectively arranged in the second accommodating parts, and the second incident surface faces the second side. In addition, the wavelengths of the light emitted by the first light-emitting modules at a starting time are different, and each first light-emitting module changes the wavelength of the light at a predetermined time interval, so that the first accommodating portion of the light guide plate and the second light-emitting module are aligned with each other. A flickering effect similar to a marquee can be produced between one side. Similarly, the wavelengths of the light emitted by the second light-emitting modules at the starting time are different, and each second light-emitting module changes the wavelength of the light at intervals of the predetermined time, so that the second accommodating part of the light guide plate and Both sides It can also produce a flickering effect similar to a marquee. In addition, the entire light guide plate can also produce a circular cyclic color change effect. With the foregoing structure, even if the number of the first light-emitting module and the second light-emitting module is much smaller than the number of key structures, the light-emitting keyboard and its backlight module can produce various color changes. Compared with the conventional luminous keyboard and backlight module, the number of (first and second) luminous modules can be greatly reduced, thereby reducing manufacturing costs.

In addition, the light emitted by the first light-emitting module forms a plurality of first light mixing areas between the first accommodation part and the first side, and the light emitted by the second light-emitting module is located in the second accommodation parts respectively. A plurality of second light mixing zones are formed between the first part and the second side. Through multiple (first and second) light mixing zones, the luminous keyboard and backlight module can present more diverse color changes and realize a full-color luminous keyboard.

Furthermore, the first light mixing area is an area where at least two first light radiation areas formed by the first light emitting modules overlap with each other, and the second light mixing area is an area where at least two first light radiation areas formed by the second light emitting modules overlap. The overlapping areas of the second light radiation areas enable the luminous keyboard and the backlight module to exhibit more diverse color changes and realize a full-color luminous keyboard. In addition, the first light mixing area includes a plurality of fourth-order first light mixing areas, and the second light mixing area includes a plurality of four-order second light mixing areas, thereby presenting more levels of color stacking and changes. .

It should be noted that the above-mentioned embodiments are examples for convenience of explanation, and the scope of rights claimed by the present invention should be subject to the scope of the patent application, and is not limited to the above-mentioned embodiments.

10:Backlight module

11:Light guide plate

111: First side

112:Second side

113:Third side

114:Fourth side

115:First Accommodation Department

116:Second Accommodation Department

117:Central area

118: Reflective structure

12:The first light-emitting module

13:Second light emitting module

Claims (18)

A backlight module including: A light guide plate, including: one opposite first side and one second side; and A plurality of first accommodating parts are provided between the first side and the second side, each of the first accommodating parts has a first incident surface, and the first incident surface faces the first side; and A plurality of second accommodating parts are provided alternately with the first accommodating parts, each of the second accommodating parts has a second incident surface, and the second incident surface faces the second side; A plurality of first light-emitting modules are respectively provided in the first accommodation parts. The wavelengths of the light emitted by the first light-emitting modules at a starting time are different, and the wavelength of the light is changed every predetermined time interval. The light emitted by the first light-emitting modules respectively enters the light guide plate from the first incident surface, and forms a plurality of first light mixing areas between the first accommodation parts and the first side; and A plurality of second light-emitting modules are respectively provided in the second accommodation parts. The wavelengths of the light emitted by the second light-emitting modules at the starting time are different, and the wavelength of the light is changed every predetermined time interval. The light emitted by the second light-emitting modules respectively enters the light guide plate from the second incident surface, and forms a plurality of second light mixing areas between the second accommodation portions and the second side. The backlight module of claim 1, wherein the light guide plate further includes an opposite third side and a fourth side, and the first light-emitting modules and the second light-emitting modules are arranged from the third side. to the fourth side and parallel to the first side and the second side. The backlight module of claim 2, wherein the wavelength of the light emitted by the first light-emitting modules at the starting time gradually decreases from the third side to the fourth side. The backlight module of claim 3, wherein the wavelength of the light emitted by the second light-emitting modules at the starting time gradually decreases from the fourth side to the third side. The backlight module of claim 1, wherein the wavelengths of the light emitted by the adjacent first light-emitting modules and the adjacent second light-emitting modules at the same time are different. The backlight module of claim 5, wherein the wavelength difference of the light emitted by two adjacent first light-emitting modules is within a predetermined wavelength range, and the wavelength difference of the light emitted by two adjacent second light-emitting modules is within a predetermined wavelength range. The wavelength difference is within the predetermined wavelength range, and the predetermined wavelength range is between 5 nm and 35 nm. The backlight module of claim 1, wherein the light guide plate has a central area, and the first accommodating parts and the second accommodating parts are disposed in the central area. The backlight module of claim 1, wherein the number of the first light-emitting modules is greater than or equal to 12, and the number of the second light-emitting modules is greater than or equal to 12. The backlight module of claim 1, wherein the number of the first light mixing areas is greater than or equal to 3, and the number of the second light mixing areas is greater than or equal to 3. The backlight module of claim 1, wherein there is a first length from the first incident surface to the first side, and the light emitted by each of the first light-emitting modules is between the first accommodating part and the third A first light radiation area is formed between one side, the first light radiation area forms a first irradiation width on the first side, and the ratio of the first irradiation width to the first length is greater than 2. The backlight module of claim 10, wherein the ratio of the first illumination width to the first length is between 2 and 5. The backlight module of claim 10, wherein the first light mixing areas are areas where at least two first light radiation areas formed by the first light emitting modules overlap with each other. The backlight module of claim 12, wherein the four overlapping first light radiation areas are a fourth-order first mixed light area, and the first mixed light areas include a plurality of the fourth-order first mixed light areas. light zone. The backlight module of claim 1, wherein the second incident surface has a second length from the second side, and the light emitted by each of the second light-emitting modules passes between the second accommodating part and the third side. A second light radiation area is formed between the two sides, the second light radiation area forms a second irradiation width on the second side, and the ratio of the second irradiation width to the second length is greater than 2. The backlight module of claim 14, wherein a ratio of the second illumination width to the second length is between 2 and 5. The backlight module of claim 14, wherein the second light mixing areas are areas where at least two second light radiation areas formed by the second light emitting modules overlap with each other. The backlight module of claim 16, wherein the overlapping areas of the four second light radiation areas are a fourth-order second light mixing area, and the second light mixing areas include a plurality of the fourth-order second light mixing areas. light zone. An illuminated keyboard including: a base plate; A plurality of button structures are connected to the base plate; and A backlight module is provided on the base plate and located below the key structures. The backlight module includes: A light guide plate, including: one opposite first side and one second side; A plurality of first accommodating parts are provided between the first side and the second side, each of the first accommodating parts has a first incident surface, and the first incident surface faces the first side; and A plurality of second accommodating parts are provided alternately with the first accommodating parts, each of the second accommodating parts has a second incident surface, and the second incident surface faces the second side; and A light-emitting module, including: A plurality of first light-emitting modules are respectively provided in the first accommodation parts. The wavelengths of the light emitted by the first light-emitting modules at a starting time are different, and the wavelength of the light is changed every predetermined time interval. The light emitted by the first light-emitting modules respectively enters the light guide plate from the first incident surface, and forms a plurality of first light mixing areas between the first accommodation parts and the first side; and A plurality of second light-emitting modules are respectively provided in the second accommodation parts. The wavelengths of the light emitted by the second light-emitting modules at the starting time are different, and the wavelength of the light is changed every predetermined time interval. The light emitted by the second light-emitting modules respectively enters the light guide plate from the second incident surface, and forms a plurality of second light mixing areas between the second accommodation portions and the second side.

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